
In dermatology, Vitamin A is used to reduce the size and function of the sebaceous gland. What are they? Sebaceous glands are glands on the human body (found in highest abundance on the face and scalp) which secrete "sebum," or oil ... oil that causes blemishes.
The decrease in the oil production leads to a decrease in bacteria on the face, which also decreases the appearance and size of blemishes ... sounds like a deal to me!